Most backend bottlenecks don’t happen because of poor hardware.
They happen because of unmanaged database connections.
When building high-throughput REST APIs using TypeScript, Node.js, and PostgreSQL, one of the most common silent killers is exhausting your database connection pool.
Here is how we tackle this in production:
• Strict Pool Limits: Always cap max connections based on your DB instance specs (don't let Node open unbounded clients).
• Idle Timeouts: Terminate idle clients gracefully so your connection pool stays lean and responsive.
• Type-Safe Queries: Leverage TypeScript interfaces with pg or Prisma to catch schema mismatches before runtime.
• Exponential Backoff: Implement robust retry logic for transient connection drops.
Writing backend logic is easy. Keeping it resilient under concurrent load is where the real engineering begins.
How do you manage connection pooling in your Node.js microservices? Let's discuss in the comments! 👇
